| 1 | The trees are sparse. | |
| 2 | In a sparse distributed network, memory is a type of perception. | |
| 3 | The pictures of the man with thinning hair never seemed right, she said. | |
| 4 | But Ma thinks these difficulties can be addressed with his sparse-representation approach. | |
| 5 | With sparse columns, both the limit on the number of columns and the associated space requirements are eliminated. |